1/* 2 * Platform IDE driver 3 * 4 * Copyright (C) 2007 MontaVista Software 5 * 6 * Maintainer: Kumar Gala <galak@kernel.crashing.org> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 */ 13 14#include <linux/types.h> 15#include <linux/init.h> 16#include <linux/kernel.h> 17#include <linux/ide.h> 18#include <linux/ioport.h> 19#include <linux/module.h> 20#include <linux/ata_platform.h> 21#include <linux/platform_device.h> 22#include <linux/interrupt.h> 23#include <linux/io.h> 24 25static void plat_ide_setup_ports(struct ide_hw *hw, void __iomem *base, 26 void __iomem *ctrl, 27 struct pata_platform_info *pdata, int irq) 28{ 29 unsigned long port = (unsigned long)base; 30 int i; 31 32 hw->io_ports.data_addr = port; 33 34 port += (1 << pdata->ioport_shift); 35 for (i = 1; i <= 7; 36 i++, port += (1 << pdata->ioport_shift)) 37 hw->io_ports_array[i] = port; 38 39 hw->io_ports.ctl_addr = (unsigned long)ctrl; 40 41 hw->irq = irq; 42} 43 44static const struct ide_port_info platform_ide_port_info = { 45 .host_flags = IDE_HFLAG_NO_DMA, 46 .chipset = ide_generic, 47}; 48 49static int plat_ide_probe(struct platform_device *pdev) 50{ 51 struct resource *res_base, *res_alt, *res_irq; 52 void __iomem *base, *alt_base; 53 struct pata_platform_info *pdata; 54 struct ide_host *host; 55 int ret = 0, mmio = 0; 56 struct ide_hw hw, *hws[] = { &hw }; 57 struct ide_port_info d = platform_ide_port_info; 58 59 pdata = dev_get_platdata(&pdev->dev); 60 61 /* get a pointer to the register memory */ 62 res_base = platform_get_resource(pdev, IORESOURCE_IO, 0); 63 res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1); 64 65 if (!res_base || !res_alt) { 66 res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0); 67 res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1); 68 if (!res_base || !res_alt) { 69 ret = -ENOMEM; 70 goto out; 71 } 72 mmio = 1; 73 } 74 75 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 76 if (!res_irq) { 77 ret = -EINVAL; 78 goto out; 79 } 80 81 if (mmio) { 82 base = devm_ioremap(&pdev->dev, 83 res_base->start, resource_size(res_base)); 84 alt_base = devm_ioremap(&pdev->dev, 85 res_alt->start, resource_size(res_alt)); 86 } else { 87 base = devm_ioport_map(&pdev->dev, 88 res_base->start, resource_size(res_base)); 89 alt_base = devm_ioport_map(&pdev->dev, 90 res_alt->start, resource_size(res_alt)); 91 } 92 93 memset(&hw, 0, sizeof(hw)); 94 plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start); 95 hw.dev = &pdev->dev; 96 97 d.irq_flags = res_irq->flags & IRQF_TRIGGER_MASK; 98 if (res_irq->flags & IORESOURCE_IRQ_SHAREABLE) 99 d.irq_flags |= IRQF_SHARED; 100 101 if (mmio) 102 d.host_flags |= IDE_HFLAG_MMIO; 103 104 ret = ide_host_add(&d, hws, 1, &host); 105 if (ret) 106 goto out; 107 108 platform_set_drvdata(pdev, host); 109 110 return 0; 111 112out: 113 return ret; 114} 115 116static int plat_ide_remove(struct platform_device *pdev) 117{ 118 struct ide_host *host = dev_get_drvdata(&pdev->dev); 119 120 ide_host_remove(host); 121 122 return 0; 123} 124 125static struct platform_driver platform_ide_driver = { 126 .driver = { 127 .name = "pata_platform", 128 .owner = THIS_MODULE, 129 }, 130 .probe = plat_ide_probe, 131 .remove = plat_ide_remove, 132}; 133 134module_platform_driver(platform_ide_driver); 135 136MODULE_DESCRIPTION("Platform IDE driver"); 137MODULE_LICENSE("GPL"); 138MODULE_ALIAS("platform:pata_platform"); 139